LPCXpresso IDE中的主题 LPC11xx: proper WDT update

LPC11xx: proper WDT update

lpcware — Thu, 16 Jun 2016 02:07:45 GMT

Content originally posted in LPCWare by trazoni on Fri Mar 04 09:52:05 MST 2011
The user manual recommends:

"Interrupts should be disabled during the feed sequence. An abort condition will occur if an
interrupt happens during the feed sequence." (see page 278).

However, the current sample code (wdt.c in driver folder) does not follow this suggestion.

So, what is right (and what is an "abort condition")?

Re: LPC11xx: proper WDT update

lpcware — Thu, 16 Jun 2016 02:07:46 GMT

Content originally posted in LPCWare by igorsk on Fri Mar 04 10:46:20 MST 2011
I guess the samples assume that interrupts are already disabled.

Re: LPC11xx: proper WDT update

lpcware — Thu, 16 Jun 2016 02:07:46 GMT

Content originally posted in LPCWare by trazoni on Mon Mar 07 02:14:31 MST 2011
You may be right. The sample code itself doesn´t make any use of WDTFeed(), so there´s no telling how it is meant to be used. But it would be certainly nice to have some comment in the code or header if disabling all interrupts is a required precondition.
As the additional ISR-jitter is very small and doesn´t matter in my application, I will add the disabling/enabling function to "my" WDTFeed-function.